cpufreq: intel_pstate: Fix crash during turbo disable

In the Linux kernel, the following vulnerability has been resolved:

cpufreq: intel_pstate: Fix crash during turbo disable

When the system is booted with kernel command line argument "nosmt" or

"maxcpus" to limit the number of CPUs, disabling turbo via:

echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo

results in a crash:

PF: supervisor read access in kernel mode

PF: error_code(0x0000) - not-present page

PGD 0 P4D 0

Oops: Oops: 0000 [#1] SMP PTI

...

RIP: 0010:store_no_turbo+0x100/0x1f0

...

This occurs because for_each_possible_cpu() returns CPUs even if they

are not online. For those CPUs, all_cpu_data[] will be NULL. Since

commit 973207ae3d7c ("cpufreq: intel_pstate: Rearrange max frequency

updates handling code"), all_cpu_data[] is dereferenced even for CPUs

which are not online, causing the NULL pointer dereference.

To fix that, pass CPU number to intel_pstate_update_max_freq() and use

all_cpu_data[] for those CPUs for which there is a valid cpufreq policy.